In February 2015 she approached Roberts, now at Menai Vehicle Solutions, to establish what she owed on credit for the car so she could pay it off.

She said: "I always intended to pay it off early and Gwyn was going to help me sort it out. Gwyn asked me to write the cheque out to him at Menai Vehicle Solutions and he would send a cheque out to Audi Finance."

She wrote cheques for £16,650 and £11,792 from two separate accounts and she believed that was the end of the matter and she would own the car.

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But Miss Williams said in March she was getting letters saying she still owed the money on the car. She said she received five letters in all but replied to Audi Finance after the first one.

She said: "They said they had not had the money. I called Gwyn (Roberts) and went to his office. He said there was a mistake on the Audi side of things and he would sort it out."

Roberts called weeks later to say the problem had been sorted out, she said. She asked him whether she should send a solicitor's letter to Audi but the accused said he had already sorted the matter out.

Miss Williams said she received a letter in October 2015 from Audi Finance saying the account had been settled but she thought that had been done in March or April that year.

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She contacted her solicitor who said the agreement was in her name and she had to pay it.

Miss Williams said she handed over the extra payment of £24,944 at the end on November or beginning of December 2015.

She never received the £28,442 back from Roberts and under cross-examination refuted the suggestion by defence barrister Mr John Philpotts that the accused hadn't told her to write the cheques out to him.

"Yes. Yes he did," she told the court.

The trial continues and the court will reconvene on Monday, January 14, at 10am.